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The effect of crystal facets and induced porosity on the performance of monoclinic BiVO4 for the enhanced visible-light driven photocatalytic abatement of methylene blue

Shafiq, Iqrash and Hussain, Murid and Shehzad, Nasir and Maafa, Ibrahim M. and Akhter, Parveen and Amjad, Ume Salma and Shafique, Sumeer and Abdul Razzaq, Abdul Razzaq and Yang, Wenshu and Tahir, Muhammad and Russo, Nunzio (2019) The effect of crystal facets and induced porosity on the performance of monoclinic BiVO4 for the enhanced visible-light driven photocatalytic abatement of methylene blue. Journal of Environmental Chemical Engineering, 7 (4). ISSN 2213-3437

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Official URL: http://dx.doi.org/10.1016/j.jece.2019.103265

Abstract

In this study, a unique two-step approach has been developed to synthesize mesoporous BiVO4 (m-BiVO4) photocatalysts. The synthesized photocatalysts were characterized by means of XRD, SEM, EDS, UV-vis, Raman, PL, DRS, and N2-physiosorption analysis techniques. The hybrid BiVO4/KIT-6 composite and m-BiVO4 particles exhibited selective growth of the (040) crystal facet, a smaller size, high surface areas, a large pore volume as a result of the porosity induced by KIT-6 and, a greater number of active sites. The charge recombination rate of m-BiVO4 was remarkably lower than that of conventional BiVO4. In addition, the bandgap energy of m-BiVO4 was 2.2eV, which is suitable for visible light irradiation. It was observed that the photocatalytic activity of m-BiVO4 was superior to that of conventional BiVO4 under visible-light illumination, due to the synergistic effect of the highly active monoclinic phase and large surface area of m-BiVO4. Furthermore, the monoclinic m-BiVO4 was also tested for photocatalytic degradation ability by using an anonymous industrial effluent for 3 h under visible light irradiation.

Item Type:Article
Uncontrolled Keywords:dye degradation, mesoporous BiVO4, mesoporous silica (KIT-6), monoclinic phase
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:89466
Deposited By: Yanti Mohd Shah
Deposited On:22 Feb 2021 14:10
Last Modified:22 Feb 2021 14:10

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